Combustible gas detection is a safety precaution aimed at timely detection and warning of potential combustible gases in the environment to prevent the occurrence of fire or explosion accidents. This process typically involves the use of combustible gas detectors or alarms, which can monitor gas concentrations in the environment in real-time and issue alerts before gas concentrations reach hazardous levels.

Toxic gas detection mainly targets gases and liquid vapors that are toxic to the human body. These gases may originate from various fields such as industrial production, mining, transportation, and daily life, such as hydrogen sulfide, carbon monoxide, sulfur dioxide, ammonia, methane, chlorine, etc. When these gases reach a certain concentration, they can pose a threat to human health and even endanger life.

Oxygen detection instruments usually use principles such as electrochemical sensors, magnetic oxygen analyzers, paramagnetic oxygen analyzers, etc. to detect the concentration of oxygen in the environment. These sensors or analyzers can accurately measure the oxygen content in the air based on the chemical reaction or physical property changes between oxygen and specific substances.